package org.echo.util;

public class SymbolUtil {

    public static String clear(String str){

        char[] chars = str.toCharArray();
        StringBuffer buffer=new StringBuffer();
        for(int i = 0; i < chars.length; i ++) {
            if((chars[i] >= 19968 && chars[i] <= 40869) || (chars[i] >= 97 && chars[i] <= 122) || (chars[i] >= 65 && chars[i] <= 90)) {
                buffer.append(chars[i]);
            }
        }

        return buffer.toString();
    }

}
